Quitting any addiction cold turkey is hard to do and it increases your chance of relapse. This week, switch from all regular soda to diet soda. Add foods high in L-glutamine, like eggs, beans and fish to your diet. L-glutamine is an amino acid that helps to reduce sugar cravings.
During the first week of the challenge, you will break the addiction to sugar. Switch from regular soda to sugar-free, diet soda only. If you only drink diet soda already, you're one step ahead of the game. Try to consume one fewer can per day.